I got the 50p Mafia 2 achievement literally 5 minutes before the reward expired.
Some of the most intense gaming I've done in awhile. Power went out this morning, and when it came back I had like 30 minutes to figure the achievement out. Had to go through a pretty long mission, cap a bunch of greasers, then steal one of their hot rods. The achievement was to go 125 MPH, so the hot rod was the way to go, but unfortunately you have to upgrade it twice to hit 125. I only had money to upgrade it once. I had 10 minutes left and no way to make money in that time, so I just went for it. Went flying down the bridge, topped out at 120 MPH, then the bridge slanted down a bit so I gained a couple MPH on the incline. Still wasn't hitting 125, a wall was coming up, just held the gas, plowed into the wall at full speed, died, and POP, there's the achievement!
Pretty wild stuff, I literally hit 125 a nanosecond before hitting the wall. There's no way Playfire is gonna track that reward, I'll have to add it to my missing rewards list I'll need to send in, but yeah. That was fun.